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Finding the Fourth Proportional to 65,876.65, 90,906.34 and 38,648.95

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Solution

The fourth proportional to 65,876.65, 90,906.34 and 38,648.95 is: 53,333.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,876.65 : 90,906.34 = 38,648.95 : x
  2. Step 2: Convert to fraction form
    65,876.65/90,906.34 = 38,648.95/x
  3. Step 3: Cross multiply
    65,876.65x = 90,906.34 × 38,648.95
  4. Step 4: Simplify right side
    65,876.65x = 3,513,434,589.34
  5. Step 5: Solve for x
    x = 3,513,434,589.34/65,876.65
  6. Step 6: Final answer
    x = 53,333.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.